PhotoOmni
PhotoOmni

4x4 cm Photo Maker Online

Make a 4x4 cm (40x40 mm) photo from a portrait on your phone. PhotoOmni crops it to a square, prepares a plain white background, and combines AI checks with expert review before delivery. Get a 472×472 px JPEG at 300 DPI and a print-ready sheet, all in your browser.

Start with a photo

AI checkedExpert verifiedExpert refinementRefund guarantee
Original portrait converted to a 4x4 cm photo with 40 mm size markers and a print-ready sheet

Photo specifications

Print size
4 × 4 cm · 40 × 40 mm
Digital output
472 × 472 px · 300 DPI
Aspect ratio
1:1 square
File format
JPEG + print-ready sheet
Preset background
Plain white
Before delivery
AI checks + expert review

How PhotoOmni Works

Get your document photo in just three simple steps.

  1. Upload a portrait

    Use a clear, original photo with space around your head and shoulders.

  2. AI checks + expert review

    We prepare the 40×40 mm crop and white background, then review framing, lighting and image quality.

  3. Download your 4x4 photo

    Receive your 472×472 px JPEG and print-ready sheet. Print at actual size to keep each photo 4×4 cm.

4x4 photo size & preparation guide

Your Guide to 4x4 cm Photos

A 4x4 photo is a square 40×40 mm image. Use this format when your application specifically asks for it. Here is how to resize, crop, check and print a 4x4 cm photo without confusing centimetres, inches or pixels.

4x4 Photo Requirements: cm, mm, Inches & Pixels

The physical size is fixed; pixel dimensions depend on resolution. The background and head-size settings below describe this generic PhotoOmni preset. Your application's document-specific instructions take priority.

Size in cm / mm
4 × 4 cm = 40 × 40 mm
Size in inches
Approx. 1.57 × 1.57 in; not 4 × 4 inches
At 300 DPI
Approx. 472 × 472 pixels — PhotoOmni JPEG output
At 600 DPI
Approx. 945 × 945 pixels — conversion reference, not this preset's output
Preset composition
1:1 square; head height 60–75% of frame; plain white background
Online submission
Check the form's required pixel dimensions, file format and maximum file size

Can I Use a 4x4 Photo for a Passport, ID or Visa?

4x4 cm is a size, not a universal passport or biometric standard. Match the format and all other photo rules to the form you are completing.

Forms requesting 40×40 mm

Choose this preset for a form that explicitly asks for a 4x4 cm square photo and accepts its white background and framing.

Passport, visa & ID applications

Use the dedicated country and document page whenever available. A 4x4 photo is not interchangeable with 35×45 mm, 50×50 mm or US 2×2 inches.

Printed square photos

Use the print-ready sheet for applications that need physical copies. Print at actual size and measure 40 mm on each side before cutting.

How to Take a 4x4 Photo at Home

A good source portrait makes the crop and review more reliable. You do not need to crop it manually before uploading.

  • Ask someone to take the photo at eye level, or use a timer. Avoid a close, arm's-length selfie.
  • Stand in soft daylight against a plain background. Avoid harsh flash, facial shadows and backlighting.
  • Look straight ahead with eyes open and mouth closed. Keep hair away from your eyes.
  • Keep your whole head and shoulders in frame with space above your hair. Upload the full-resolution original.
  • Turn off beauty filters, face reshaping and portrait blur. Check your application's rules on glasses and photo editing.

Why 4x4 Photos Get Rejected

Use this checklist before submitting. A correct square canvas cannot compensate for the wrong document format or an unclear source photo.

4x4 photo examples comparing a white-background portrait with incorrect head size, tilted head, smiling, sunglasses, dark lighting, wrong background and filters
View full-size image
  • Wrong units: a 4×4 inch photo is much larger than 4×4 cm.
  • Print scaling changes the size: Fit to page or borderless enlargement makes the finished photo larger or smaller than 40 mm.
  • Wrong upload settings: the form requests different pixels, a different file type or a lower file-size limit.
  • Poor source quality: blur, glare, shadows, filters or a tilted head obscure your natural appearance.
  • Document mismatch: the authority requires a different size, head proportion, background color or an unedited image.

PhotoOmni vs. Online Tools vs. Photo Studios

PhotoOmni prepares your 40×40 mm photo with AI pre-checks, expert review and adjustments when needed. Compare the convenience, delivered files, rejection protection and price before choosing a service.

  • Convenience

    PhotoOmni
    Upload from home in minutes
    Other online tools
    Usually online
    Traditional photo studios
    Requires a store visit

  • Peace of mind

    PhotoOmni
    AI pre-check plus expert approval
    Other online tools
    May lack expert review or charge extra for it
    Traditional photo studios
    Depends on local staff

  • Expert adjustments

    PhotoOmni
    Included when needed
    Other online tools
    Varies by service
    Traditional photo studios
    Usually retake-based

  • Ready-to-use files

    PhotoOmni
    Digital photo plus print-ready sheet
    Other online tools
    May be limited or extra
    Traditional photo studios
    Digital copy may not be included

  • Rejection protection

    PhotoOmni
    100% refund for photo-caused rejection
    Other online tools
    Policy varies
    Traditional photo studios
    Policy varies by shop

  • Total price & inclusions

    PhotoOmni
    One-time fee of $5.99
    Other online tools
    Add-ons can cost $3–$10+
    Traditional photo studios
    Often $15+; files vary

Frequently asked questions

What is the 4x4 photo size in cm and mm?
A 4x4 cm photo is 4 centimetres wide and 4 centimetres high: exactly 40×40 mm with a 1:1 aspect ratio. In inches it is approximately 1.57×1.57. It is different from a 4×4 inch print or a 4×6 inch photo.
What is a 4x4 photo size in pixels at 300 and 600 DPI?
Use pixels = centimetres ÷ 2.54 × DPI. Rounded to whole pixels, 4×4 cm is about 472×472 pixels at 300 DPI or 945×945 pixels at 600 DPI. PhotoOmni's preset delivers 472×472 px at 300 DPI. For an online form, its stated pixel dimensions and file-size limits take priority over print DPI.
How do I edit a photo to 4x4 online?
Upload your original portrait on this page. The 4x4 photo converter applies the square crop and 40×40 mm output, prepares the white background, and sends the result for expert review. Start with enough space around the head; resizing cannot recover a cropped-off chin or hair.
Can I make a 4x4 photo online for free?
You can crop a square image yourself with a free editor. PhotoOmni's finished photo service costs $5.99 and includes AI checks, expert review, a digital JPEG and a print-ready sheet. A free crop alone does not verify physical print size or document-specific requirements.
Does the 4x4 photo checker include human verification?
Yes. AI pre-checks are followed by expert review before delivery. We review the crop, head position, background, lighting and image quality. The generic 4x4 preset uses a white background and a head height of 60–75% of the frame; these are PhotoOmni settings, not universal official rules. Final acceptance rests with the receiving organisation.
Can I use a 4x4 passport photo for an ID or visa?
Only if the application explicitly requests 4×4 cm or 40×40 mm and accepts the background and framing. A square crop alone does not make a biometric photo compliant. For a named country or document, check the document-specific photo pages.
How do I print a 4x4 cm photo or printable PDF?
Download the print-ready sheet and match the paper size to the sheet. Select 100% or Actual size and disable Fit to page, enlargement and borderless scaling. Measure a photo after printing: both sides should be 40 mm. If you need a PDF, use your device's Save as PDF option while preserving the original page size; PDF export is not a separate PhotoOmni output.
Can I use the 4x4 photo maker on iPhone or Android without an app?
Yes. Open PhotoOmni in your phone's browser and upload the original camera image. You can also use a desktop browser. For the source photo, ask someone to take it at eye level in soft daylight; turn off beauty filters and portrait blur.
What background should a 4x4 photo have?
This preset produces a plain white background. The 4x4 cm measurement defines the canvas, not a universal background rule. Check whether your application requests white, another color, or an unedited background before ordering. Use a dedicated document page if its rules differ.
What should I do if my 4x4 photo is rejected?
Read the rejection reason first. Retake the source image for blur, glare or an incorrect pose. Check the requested dimensions, file limits and print scaling for technical problems. If the issue concerns the delivered file, contact PhotoOmni support with the exact message. Refunds follow our refund policy.

Ready to create your photo?

Upload a photo and get a document-ready result in minutes.

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